He said I must have done something bad to deserve it.
他說(shuō)我肯定是罪有應(yīng)得。
Now, I hadn't told him these details, so he must have done some research on his own.
你看，我沒(méi)有告訴他這些細(xì)節(jié)，因此他一定是自己作了一些調(diào)查。
She must have done a lot of work on it.
她一定在這上面花了不少功夫。
Where you come from, you must have done something.
你從哪里來(lái)的，你一定做了什么事。
You must have done well to have achieved this success.
你取得了這樣的成就，一定干的錯(cuò)。